subduction

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subduction

[səb′dək·shən]
(geology)
The process by which one crustal block descends beneath another, such as the descent of the Pacific plate beneath the Andean plate along the Andean Trench.
References in periodicals archive ?
Rather, the lower plate redirects its motion and subducts downward, just as an oceanic plate does when it collides with a continent (figure 3).
CommScope's new ConQuest(R) Detectable SubDuct conduit, with its innovative design, targets underground cable networks having current and future cable capacity requirements.
Geologists from the University of California, Berkeley, have proposed that a large area of upwelling hot rock has effectively lubricated the movement at the plate's boundary as it subducts under the vast North American plate.
For two decades, geoscientists have debated what happens to the ocean floor when it subducts, or dives down into the Earth's mantle, the region whence it came.
In general, it is accepted that in the Southern region, the Nazca plate continuously subducts with a 30[degrees] dip angle down to about 300 km depth; while in the Central region, the plate subducts with an initial 10[degrees] dip angle from the trench to the coastline, increasing to a 30[degrees] dip to a depth of 120 km, and then becoming almost horizontal up to distances of 500 km from the trench.
Because the Juan de Fuca plate is soyoung when it subducts, it is still relatively warm and buoyant compared with older subducting plates.